Excellent job!
Very nicely done, dude! I really can't find anything seriously wrong or that could use changing with this flash, its just that good! The graphics were very nicely done; a good mix between the 8-bit and mario along with the 64-bit Resident evil, averages out to around 16 to 32-bit, which is what we have here. The sound is nice, crisp, and fitting, the music fits with the style, it was funny as hell, and the sprite editing shows a lot of talent. Not to mention the file size is surprisingly small!
I liked the door thing. Very classic and spoofable.
Contrary to popular belief, it rather fits that there isn't much music or sound, considering that the Resident evil game didn't have very much sound or music. Good job with the ambience and style!
The only thing I can think to add is a little more of a voice track. They did a lot of talking in ResEvil, and a voice track with good acting is always impressive. Its not essential, though.
Thats the only real suggestion I can make. EXCELLENT job with this movie, I look forward to anything else!!